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Hydrobiologia

, Volume 131, Issue 1, pp 23–30 | Cite as

The role of nitrogen and phosphorus in the development of Cladophora glomerata (L.) Kutzing in the Manawatu River, New Zealand

  • M. C. Freeman
Article

Abstract

Physiological indicators of nitrogen and phosphorus deficiency were used to determine the role of these nutrients in the development and proliferation of Cladophora in the Manawatu River, New Zealand. Nitrogen indicator tests showed that surplus nitrogen was available at all times. During a sustained low flow period when the dissolved reactive phosphorus was between 4–5 mg m−3, phosphorus indicator tests revealed that the Cladophora proliferations were phosphorus deficient. A downstream trend of reduced nitrogen and phosphorus availability was also observed during this period. Sudden high river flows were frequent and had a major influence on the Cladophora biomass.

Keywords

Cladophora periphyton filamentous algae nitrogen phosphorus physiological indicator tests bioassays Manawatu River New Zealand 

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Copyright information

© Dr W. Junk Publishers 1986

Authors and Affiliations

  • M. C. Freeman
    • 1
  1. 1.Biotechnology DepartmentMassey UniversityPalmerston NorthNew Zealand

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